code: def do_nothing():
      pass
  
imports: from unittest import TestCase
  import tempfile
  import operator
  import numpy
  import tensorflow
  import pytest
  from tensorflow.keras.metrics import MeanSquaredError, CategoricalAccuracy
  from tensorflow.keras import layers, Model
  from tensorflow.keras.applications import MobileNetV2
  from bigdl.nano.tf.keras import InferenceOptimizer
label_desc: Use image node_id 4 for calling the MyModel obj's underlying member method code with example usage: obj.do_nothing() without return types